Tests

Make --allow-redefinition mean --allow-redefinition-new #21852

Job	Run time
Test mypyc suite with 32-bit Python	10m 35s
Test suite with py314-ubuntu, mypyc-compiled	15m 29s
Test suite with py313-ubuntu, mypyc-compiled	15m 8s
Parallel tests with py314-ubuntu, mypyc-compiled	29m 10s
Test suite with py310-ubuntu, mypyc-compiled	16m 11s
mypyc runtime tests with py313-macos	7m 20s
Test suite with py314t-ubuntu, mypyc-compiled	17m 48s
Parallel tests with py314-ubuntu, interpreted	23m 59s
Test suite with py311-ubuntu	9m 18s
Type check our own code (py310-ubuntu)	1m 12s
Test suite with py314-windows-64	27m 28s
mypyc runtime tests with py310-ubuntu	6m 34s
Parallel tests with py314-windows-64, interpreted	8m 13s
Type check our own code (py310-windows-64)	2m 20s
Formatting and code style with Black + ruff	2m 2s
Test suite with py312-ubuntu	9m 30s
	3h 22m 17s

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